Commit 3cfde36d authored by Marc Zyngier's avatar Marc Zyngier Committed by Oliver Upton
Browse files

KVM: arm64: nv: Truely enable nXS TLBI operations 



Although we now have support for nXS-flavoured TLBI instructions,
we still don't expose the feature to the guest thanks to a mixture
of misleading comment and use of a bunch of magic values.

Fix the comment and correctly express the masking of LS64, which
is enough to expose nXS to the world. Not that anyone cares...

Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240703154743.824824-1-maz@kernel.org


Signed-off-by: default avatarOliver Upton <oliver.upton@linux.dev>
parent 0feec776

arch/arm64/kvm/nested.c

+2 −2
Original line number Diff line number Diff line
@@ -810,8 +810,8 @@ static u64 limit_nv_id_reg(u32 id, u64 val) 
		break;



	case SYS_ID_AA64ISAR1_EL1:

		/* Support everything but Spec Invalidation */

		val &= ~(GENMASK_ULL(63, 56)	|

		/* Support everything but Spec Invalidation and LS64 */

		val &= ~(NV_FTR(ISAR1, LS64)	|

			 NV_FTR(ISAR1, SPECRES));

		break;